in manga chapter 453, madara said that he want sasuke to synchronize with the Gedo Statue.. that mean he want sasuke to be like nagato who can control the Gedo Statue when he fight with hanzo with rod attach at the back side..
the question, will madara give sasuke the rinnegan... madara have...
My theory is The Ten tailed beast is the ''Dajjal'' (Eye Of Horus) , waiting to be awaken.. Uchiha Madara is the darkness and Naruto is the light..
At the end, Light will win against darkness (The Eye Of Horus) '"Dajjal"
i think the 10 tails is the demonic statue that nagato summon when he fight hanzo.. it is also the place that madara keep all the tailed beast shut seal